编写一个MainActivity和MyService，在MainActivity中的onCreate()函数中为两个按钮分别设置点击事件监听器，点击第一个按钮启动服务弹出一个Toast显示“您点击了第一个按钮”，点击第二个按钮启动服务弹出一个Toast显示“您点击了第二个按钮”。（以action区分不同的动作）

  • MainActivity.java

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    public class MainActivity extends AppCompatActivity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            final Button button1 = findViewById(R.id.button1);
            Button button2 = findViewById(R.id.button2);
            button1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent(MainActivity.this, MyService.class);
                    intent.setAction("ACTION_BUTTON_1");
                    startService(intent);
                }
            });
            button2.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent(MainActivity.this, MyService.class);
                    intent.setAction("ACTION_BUTTON_2");
                    startService(intent);
                }
            });
        }
    }

  • MyService.java

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    public class MyService extends Service {
        public MyService() {
        }

        @Override
        public IBinder onBind(Intent intent) {
            throw new UnsupportedOperationException("Not yet implemented");
        }

        @Override
        public int onStartCommand(Intent intent, int flags, int startId) {
            String intentAction = intent.getAction();
            if (intentAction.equals("ACTION_BUTTON_1")) {
                Toast.makeText(this, "您点击了第一个按钮", Toast.LENGTH_LONG).show();
            } else if (intentAction.equals("ACTION_BUTTON_2")) {
                Toast.makeText(this, "您点击了第二个按钮", Toast.LENGTH_LONG).show();
            }
            return super.onStartCommand(intent, flags, startId);
        }
    }